add check for win32 or msys before running rustc-with-gold fixes #9499
add check for win32 or msys before running rustc-with-gold fixes #9499

KiChjang/servo,splav/servo,cbrewster/servo,ConnorGBrewster/servo,peterjoel/servo,fiji-flo/servo,jimberlage/servo,sadmansk/servo,larsbergstrom/servo,paulrouget/servo,ConnorGBrewster/servo,nnethercote/servo,fiji-flo/servo,DominoTree/servo,anthgur/servo,cbrewster/servo,emilio/servo,KiChjang/servo,canaltinova/servo,peterjoel/servo,thiagopnts/servo,upsuper/servo,steveklabnik/servo,paulrouget/servo,KiChjang/servo,anthgur/servo,canaltinova/servo,upsuper/servo,KiChjang/servo,emilio/servo,upsuper/servo,avadacatavra/servo,fiji-flo/servo,eddyb/servo,DominoTree/servo,CJ8664/servo,dati91/servo,eddyb/servo,rnestler/servo,mattnenterprise/servo,thiagopnts/servo,eddyb/servo,nrc/servo,SimonSapin/servo,fiji-flo/servo,peterjoel/servo,saneyuki/servo,dsandeephegde/servo,jimberlage/servo,saneyuki/servo,saneyuki/servo,eddyb/servo,mbrubeck/servo,peterjoel/servo,larsbergstrom/servo,mattnenterprise/servo,CJ8664/servo,notriddle/servo,rnestler/servo,thiagopnts/servo,dsandeephegde/servo,KiChjang/servo,mattnenterprise/servo,pyfisch/servo,cbrewster/servo,szeged/servo,larsbergstrom/servo,DominoTree/servo,eddyb/servo,mbrubeck/servo,eddyb/servo,steveklabnik/servo,larsbergstrom/servo,nrc/servo,upsuper/servo,pyfisch/servo,canaltinova/servo,dati91/servo,paulrouget/servo,fiji-flo/servo,dati91/servo,KiChjang/servo,splav/servo,cbrewster/servo,mattnenterprise/servo,fiji-flo/servo,peterjoel/servo,SimonSapin/servo,CJ8664/servo,emilio/servo,peterjoel/servo,saneyuki/servo,upsuper/servo,sadmansk/servo,fiji-flo/servo,cbrewster/servo,nrc/servo,upsuper/servo,mattnenterprise/servo,steveklabnik/servo,splav/servo,sadmansk/servo,nnethercote/servo,peterjoel/servo,thiagopnts/servo,notriddle/servo,pyfisch/servo,emilio/servo,pyfisch/servo,nrc/servo,szeged/servo,saneyuki/servo,KiChjang/servo,notriddle/servo,avadacatavra/servo,dsandeephegde/servo,anthgur/servo,mbrubeck/servo,mbrubeck/servo,jimberlage/servo,thiagopnts/servo,anthgur/servo,notriddle/servo,avadacatavra/servo,mbrubeck/servo,pyfisch/servo,mattnenterprise/servo,pyfisch/servo,CJ8664/servo,SimonSapin/servo,pyfisch/servo,nnethercote/servo,anthgur/servo,KiChjang/servo,peterjoel/servo,sadmansk/servo,anthgur/servo,cbrewster/servo,canaltinova/servo,notriddle/servo,ConnorGBrewster/servo,nrc/servo,szeged/servo,CJ8664/servo,DominoTree/servo,rnestler/servo,thiagopnts/servo,splav/servo,steveklabnik/servo,SimonSapin/servo,nrc/servo,avadacatavra/servo,jimberlage/servo,SimonSapin/servo,steveklabnik/servo,avadacatavra/servo,szeged/servo,dati91/servo,szeged/servo,ConnorGBrewster/servo,nnethercote/servo,KiChjang/servo,fiji-flo/servo,steveklabnik/servo,mbrubeck/servo,eddyb/servo,DominoTree/servo,SimonSapin/servo,dati91/servo,canaltinova/servo,dati91/servo,steveklabnik/servo,upsuper/servo,pyfisch/servo,rnestler/servo,DominoTree/servo,notriddle/servo,jimberlage/servo,larsbergstrom/servo,mattnenterprise/servo,larsbergstrom/servo,CJ8664/servo,SimonSapin/servo,szeged/servo,jimberlage/servo,notriddle/servo,sadmansk/servo,mattnenterprise/servo,CJ8664/servo,DominoTree/servo,larsbergstrom/servo,larsbergstrom/servo,dsandeephegde/servo,saneyuki/servo,DominoTree/servo,cbrewster/servo,splav/servo,splav/servo,larsbergstrom/servo,paulrouget/servo,dsandeephegde/servo,ConnorGBrewster/servo,nnethercote/servo,szeged/servo,emilio/servo,splav/servo,nnethercote/servo,nrc/servo,canaltinova/servo,ConnorGBrewster/servo,peterjoel/servo,saneyuki/servo,nnethercote/servo,saneyuki/servo,paulrouget/servo,DominoTree/servo,rnestler/servo,szeged/servo,avadacatavra/servo,upsuper/servo,splav/servo,avadacatavra/servo,notriddle/servo,dati91/servo,saneyuki/servo,dsandeephegde/servo,jimberlage/servo,anthgur/servo,dati91/servo,splav/servo,emilio/servo,larsbergstrom/servo,dsandeephegde/servo,nnethercote/servo,pyfisch/servo,jimberlage/servo,szeged/servo,sadmansk/servo,paulrouget/servo,rnestler/servo,mbrubeck/servo,pyfisch/servo,szeged/servo,eddyb/servo,ConnorGBrewster/servo,emilio/servo,peterjoel/servo,jimberlage/servo,rnestler/servo,emilio/servo,canaltinova/servo,thiagopnts/servo,cbrewster/servo,CJ8664/servo,sadmansk/servo,ConnorGBrewster/servo,splav/servo,avadacatavra/servo,rnestler/servo,paulrouget/servo,anthgur/servo,SimonSapin/servo,paulrouget/servo,notriddle/servo,canaltinova/servo,saneyuki/servo,mbrubeck/servo,DominoTree/servo,paulrouget/servo,nnethercote/servo,thiagopnts/servo,nnethercote/servo,sadmansk/servo,dsandeephegde/servo,KiChjang/servo,notriddle/servo,paulrouget/servo,emilio/servo,emilio/servo